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HUBBLE SPACE TELESCOPE

DAILY REPORT #2770

PERIOD COVERED: 0000Z (UTC) 12/14/00 - 0000Z (UTC) 12/15/00

Daily Status Report as of 350/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed WF/PC-2 8683 (Imaging Of Brightest Cluster Galaxies: The
High End Of The Black Hole Mass Distribution)

The WF/PC-2 was used to make kinematic black hole detections in
galaxies to decide whether they indicate that the mass correlates with both
optical luminosity and radio power. The observation completed with no
reported problems.

1.2 Completed Three Sets of STIS/CCD 8562 (Probing the Large Scale
Structure: Cosmic Shear Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to probe
the distortion of light bundles from distant galaxies, looking at the
statistical properties of the intervening inhomogeneous {dark} matter
distribution. The proposal completed nominally.

1.3 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.4 Completed Five Sets of WF/PC-2 8816 (Cycle 9 UV Earthflats)

The WF/PC-2 was used to obtain sequences of earth streak flats to
improve the quality of pipeline flat fields for the WFPC2 UV filter set and
in order to monitor flat field stability. As described in HSTAR 8006 and
2.1, the acquisition for the final iteration of this proposal failed, the
take data flag remained down, and one observation was lost. There were no
other reported problems.

1.5 Completed WF/PC-2 8827 (Cycle 9 Supplemental Darks pt2/3)

The WF/PC-2 was used to obtain three dark frames every day to
provide data for monitoring and characterizing the evolution of hot
pixels. The proposal completed nominally.

1.6 Completed WF/PC-2/STIS/CCD 8641 (Testing the Accelerating Universe)

The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were
used to observe Type Ia supernovae which provide evidence for an
accelerating universe: an extraordinary result that needs to be rigorously
tested. The observations completed with no reported problems.

1.7 Completed STIS/CCD 8838 (Bias Monitor - Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at
gain = 4, to build up high-S/N superbiases and track the evolution of hot
columns. The proposal completed nominally.

1.8 Completed STIS/MA1 8657 (Jovian Auroral Variability Due to the
Solar Wind/Magnetosphere Interaction)

The Space Telescope Imaging Spectrograph (MA1) was used to observe
Jupiter, covering nearly complete Jupiter rotations, permitting the
observers to perform several known key measurements of the auroral
emissions, and also to study uniquely the effects of solar wind variations
on the auroral morphology. The proposal completed nominally.

1.9 Completed STIS/CCD 7310 (The Interaction of Accretion Disks with
Protostellar Binaries)

The Space Telescope Imaging Spectrograph (CCD) was to be used to
study the interaction of the accretion disk with the protostellar binary
system GG-Tau. As described in HSTAR 8006 and 2.1, the acquisition for
this proposal failed, the take data flag remained down, and two
observations were lost.

1.10 Completed WF/PC-2 8805 (POMS Test Proposal: WFII Parallel Archive
Proposal Continuation)

The WF/PC-2 was to be used to perform a generic target version of
the WFPC2 Archival Pure Parallel program. As described in HSTAR 8006 and
2.1, the acquisition for this proposal failed, the take data flag remained
down, and one observation was lost.

1.11 Completed WF/PC-2 8453 (Cycle 8 Polarization)

The WF/PC-2 was used to verify the stability of its polarization
calibration. There were no reported problems.

1.12 Completed Two Sets of WF/PC-2 8867 (Gamma-Ray Bursts: Discovering
The Progenitors And Understanding The Explosion - Visits A0-R0)

The WF/PC-2 was used to observe a gamma-ray burster,
GRB000926. Gamma-ray burst astronomy, one of the most active and exciting
frontiers in astrophysics, is now entering a critical stage -- with
dramatic leaps in understanding of these events, as well as new
discoveries. Improvements in triggering and positioning accuracy provided
by the SAX and HETE-2 gamma-ray satellites will allow entirely new classes
of events to be studied. Given the recent progress in this field, the
proposers are now in a position to design precision, broadband measurements
that can provide quantitative information on the as-yet unknown energy
sources, the explosion geometry, and the surrounding medium. In
particular, the growing evidence of an intimate connection between SNe and
GRBs can be definitively tested. The proposal completed with no reported
problems.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 5
Successful: 4

Per HSTAR 8006, the acquisition at 349/183000Z failed to gyro
control, affecting the observations detailed in 1.4, 1.9, and 1.10.

The acquisition at 350/085739Z defaulted to fine lock backup on
FGS-3 only when the scan step limit was exceeded on FGS-1. Two proposals,
occurring during the period of the next report, may have been affected:
WF/STIS 8277 and WF 8816.
Scheduled Re-acquisitions: 9
Successful: 9

2.2 FHST Updates:
Scheduled: 14
Successful: 14

2.3 Operations Notes:

Using ROP SR-1A, the SSR EDAC error counter was cleared twice.

Per ROP DF-18A, the engineering status buffer limits were adjust on
two occasions.

In conjunction with the acquisition failed mentioned in 2.1 above,
STIS errors were cleared at 349/1913Z per ROP NS-12.

A TTR was written for data hits encountered in the interval
350/020932Z to 350/020953Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW